1. Department of Chemistry “Ugo Schiff”; University of Florence; Via della Lastruccia, 3-13 50019 Sesto Fiorentino Italy
2. Department of Chemistry; Materials and Chemical Engineering “G. Natta”; Milan Polytechnic; via Mancinelli 7 20131 Milano Italy
3. Department of Chemistry and Technology of Drugs; University “La Sapienza”; P.le A. Moro 5 - 00185 Roma Italy